Officials say North Korea has sent troops to Russia. What would that mean for the war with Ukraine? The Associated PressChina May Chafe as North Korea Sends Soldiers to Fight Ukraine The New York TimesNorth Korean troops fighting in Ukraine for Russia would be ‘fair game,’ White House says. Kyiv IndependentKey Republican: US should consider ‘direct military action’ if North Korean troops enter Ukraine The HillNorth Korean troops are in Russia, would be ‘legitimate targets’ in Ukraine, U.S. says The Washington Post